CN114260104B - Flotation equipment and flotation method suitable for collecting foam products - Google Patents
Flotation equipment and flotation method suitable for collecting foam products Download PDFInfo
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Abstract
The invention discloses a flotation device suitable for collecting foam products, comprising: barrel, baffle, sorting board and air charging equipment; one end of the cylinder is open, the other end of the cylinder is closed, and the cylinder is divided into two chambers by the partition plate; the two chambers are communicated at one closed end of the cylinder body, and the two chambers are not communicated at one open end of the cylinder body; the cylinder is placed in an inclined manner, the closed end of the cylinder faces upwards, and the open end of the cylinder faces downwards; the two chambers are divided into a first chamber and a second chamber from top to bottom according to the distance from the ground, one downward ends of the first chamber and the second chamber are respectively provided with an ore discharge port and an ore feeding port, and the separation plate is arranged at the ore discharge port; a plurality of inflation openings are formed in the chamber wall of one side, close to the ground, of the second chamber, and the inflation equipment inflates the second chamber through the inflation openings. The invention also provides a flotation method which can effectively collect foam products with large quantity, high concentration and poor fluidity by using the equipment.
Description
Technical Field
The invention belongs to the technical field of mineral separation, and particularly relates to flotation equipment and a flotation method suitable for collecting foam products.
Background
In the ore dressing production practice, a flotation process is often adopted for the separation of graphite ore, mica ore and the like. However, in the enrichment process, due to the influence of flotation agents (such as amines), and the characteristics of good floatability or easily floatable flakes of minerals, the problems of large foam amount, high foam concentration and poor flow of concentrate often exist; particularly for raw ores with high mud content, the above-mentioned situation is aggravated. This disadvantage causes the difficult problems of difficult control, unsatisfactory sorting effect and frequent potential safety hazards of flotation operation.
Regarding this difficulty, the prior art has mainly 2 aspects: on one hand, the indexes such as the foam quantity, the viscosity and the like are controlled through the adjustment of a medicament system, for example, the foam quantity is reduced, and the foam viscosity is reduced so as to improve the fluidity; on the other hand, a pretreatment link is added, such as pre-desliming is performed, and the pulp quantity entering the flotation operation is reduced, so that the foam generation quantity is reduced from the source.
The two methods focus on the change of medicaments and processes, and no technical research on effectively collecting foams with large quantity, high concentration and poor fluidity is carried out from the equipment perspective. It is therefore desirable to provide a flotation apparatus and a flotation process suitable for collecting froth products.
In view of this, the present application is specifically proposed.
Disclosure of Invention
The present invention provides a flotation apparatus suitable for collecting froth products, the flotation apparatus comprising: barrel, baffle, sorting board and air charging equipment;
one end of the cylinder body is opened, the other end of the cylinder body is closed, and the cylinder body is divided into two chambers by the partition plate; the two chambers are communicated at one closed end of the cylinder body, and the two chambers are not communicated at one open end of the cylinder body;
the cylinder is placed in an inclined mode, the closed end of the cylinder faces upwards, and the open end of the cylinder faces downwards;
the two chambers are divided into a first chamber and a second chamber from top to bottom according to the distance from the ground, and a mineral discharge port and a mineral feeding port are respectively formed at one downward end of the first chamber and one downward end of the second chamber;
the separation plate is arranged at the ore discharge port and divides the ore discharge port into a first product outlet and a second product outlet;
a plurality of inflation openings are formed in the chamber wall of one side, close to the ground, of the second chamber, and the inflation equipment inflates the second chamber through the inflation openings.
As a further improvement of the invention, the separation plate can adjust the distance between the separation plate and the partition plate, the separation plate is close to the partition plate, which is beneficial to improving the recovery rate of foam products, and the separation plate is far away from the partition plate, which is beneficial to improving the grade of foam products.
As a further improvement of the invention, the included angle between the cylinder body and the horizontal direction in the oblique vertical direction is 0-90 degrees.
As a further improvement of the present invention, the radial cross section of the cylinder is trapezoid-like, and the cylinder is cylindrical-like in the axial direction.
As a further improvement of the invention, the chamber widths of the first chamber and the second chamber are sequentially reduced in radial section, the first chamber width is 2-3 times the second chamber width, and the first chamber width is 1-2 times the radial height of the cylinder.
As a further improvement of the invention, the front and the rear of the ore feeding mouth are respectively arranged into a horn mouth shape, the narrow mouth parts of the two horn mouths are communicated, the diffusion angle of the front horn mouth of the ore feeding mouth is smaller than that of the rear horn mouth of the ore feeding mouth, and preferably, the ratio of the diffusion angle of the front horn mouth of the ore feeding mouth to the diffusion angle of the rear horn mouth of the ore feeding mouth is 1:3-4.
As a further improvement of the present invention,
the second chamber is sequentially divided into a dispersing area, a mineralizing area and a sorting area from low to high according to the distance from the ground;
the apertures of the charging openings of the dispersing area, the mineralizing area and the sorting area are sequentially reduced;
the inflation pressures of the inflation openings of the dispersing area, the mineralizing area and the sorting area are sequentially reduced;
the gas flow rate of the charging port of the mineralization area is larger than that of the charging ports of the dispersion area and the separation area;
the distribution of the charging openings of the mineralization area is denser than that of the charging openings of the dispersing area and the sorting area, and the distribution density of the charging openings of the mineralization area is gradually reduced along the movement direction of ore pulp;
the inflation pressure of the inflation inlet is 150 to 250kPa;
the inflation flow of the inflation inlet ranges from 0.5 m to 1.5m 3 /m 2 /min。
The invention also provides a flotation method of the flotation equipment, which comprises the following steps:
step one, pre-mixing ore pulp and a flotation reagent, and pressurizing and feeding the mixture from a ore feeding port after uniformly mixing;
step two, after the ore pulp enters a dispersing area, continuously spraying the ore pulp through an air charging port with a thicker bottom aperture, wherein the spraying pressures are alternately circulated in a strong and weak way;
step three, after the ore pulp enters a mineralization area, intermittent pulse jet flow is performed through a bottom gas charging port;
and fourthly, after the ore pulp enters the separation zone, uniformly and stably spraying flow through the bottom air charging port, so that the ore pulp moves upwards along the inclined cube to reach the top end of the flotation equipment and is separated into a foam product and a selected underflow product, wherein the foam product is discharged from a first product outlet after passing through the separation plate due to low density, and the selected underflow product is discharged from a second product outlet after passing through the separation plate due to high density.
As a further improvement of the invention, the separation plate in the fourth step can adjust the distance between the separation plate and the partition plate, the separation plate is close to the partition plate, which is beneficial to improving the recovery rate of foam products, and the separation plate is far away from the partition plate, which is beneficial to improving the grade of foam products.
As a further improvement of the invention, the method comprises the steps of:
step one, pre-mixing ore feeding with the mass fraction of solids being 20% -30% with a flotation reagent, and pressurizing the mixture to feed the mixture from an ore feeding port after the mixture is uniformly mixed, wherein the flow is 10-20L/min;
step two, after the ore pulp enters a dispersing area, the jet pressure is alternately circulated in strong and weak mode through continuous jet flow with a thicker bottom, so that turbulence with the maximized quantity is generated, and secondary full dispersion of the ore pulp is realized;
step three, after ore pulp enters a mineralization area, intermittent pulse jet flow passes through the bottom, distribution points and jet pressure of the jet flow slightly decrease and become small along with movement of the ore pulp, and intermittent mineralization and continuous layering are realized, so that the aim of reducing generation of gangue entrainment is achieved, layering speed is in gradient arrangement, time is won for enrichment of mineralized bubbles, a channel is formed for shedding of gangue, and objective easily-floated minerals move upwards along with the bubbles and gangue minerals are separated from the bubbles to sink. The shape of the radial cross section of the second chamber with wide upper part and narrow lower part also promotes the generation of an upper negative pressure area, and accelerates the process;
and fourthly, after the ore pulp enters the separation zone, the mineralization process is almost finished, under the assistance of uniform and stable airflow at the bottom, the ore pulp moves upwards along the inclined cube direction to reach the top end of the equipment, foam products are discharged from a first product outlet after passing through the separation plate due to small density, and the selected underflow products are discharged from a second product outlet after passing through the separation plate due to large density, so that 2 products, namely foam products and selected underflow, are generated. The two products are discharged from the two ore discharge ports through the separation plate in a laminar flow state respectively, and can be used as final products or enter the next separation operation.
Compared with the prior art, the invention has the beneficial effects that:
(1) Traditional graphite, mica and high-mud-content easy-to-float mineral flotation equipment often adopts a flotation machine or a flotation column, and the flotation machine needs mechanical strong stirring, so that component abrasion and energy consumption waste are caused; flotation columns are often used because of the need for sufficient separation distance in the axial direction, resulting in high columns, increased plant capital construction, etc. The invention uses different airflows and different sites to disperse and sort, changes the traditional concept of indirectly promoting the action of gas and mineral through mechanical energy or expanding and prolonging the action of gas and mineral in space time to increase the opportunity of the action of gas and mineral, and changes the concept into the direct control of airflows to directly act with mineral particles. The prior indirect control is changed into direct control, so that the control capability is enhanced, the control effect is improved, the indirect energy consumption is reduced, and the action efficiency is improved;
(2) In the traditional flotation process of graphite, mica and easily-floated minerals with high mud content, after mineralized bubbles are generated, the collecting bubbles such as scraping plates or liquid level improvement are needed to provide additional energy, and the flotation equipment and the operation method provided by the invention utilize the natural reduction of gravitational potential energy to smoothly discharge the bubbles, so that the flotation equipment and the operation method are economical and environment-friendly;
(3) In the traditional flotation process of graphite, mica and easily-floated minerals with high mud content, foam is required to be scraped out slowly for a plurality of times, but due to the large foam quantity, high concentration and poor fluidity, the phenomenon of in-situ idle running of a scraper is often caused, the ore discharge rate is very low, and even the phenomenon of leakage and drooling occurs; the flotation equipment and the operation method provided by the invention discharge the generated foam as a whole at one time, so that the ore discharge rate is greatly improved;
(4) The flotation equipment and the operation method provided by the invention realize the functions of dispersing ore pulp and generating mineralized foam directly through the regulation and control of aeration, and compared with the mechanical transmission operation in the traditional process, the flotation equipment and the operation method can reduce noise pollution and improve the workshop working environment while saving various costs.
Drawings
FIG. 1 is an axial cross-sectional view of the flotation apparatus of the present invention;
FIG. 2 is an A-direction view of the flotation apparatus of the present invention;
in the figure:
1: a partition plate; 2: a sorting plate; 3: a first chamber; 5: a second chamber; 6: a first product outlet; 7: a second product outlet; 8: a mineral feed port; 9: an inflation inlet; 10: a dispersion zone; 11: a mineralization zone; 12: and (5) sorting areas.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
It is further to be noted that the terms "first" and "second" are merely used for convenience in describing the present invention and for simplifying the description, and are not indicative or implying that the apparatuses or elements in question are ordered by importance or must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the term "disposed" and the like should be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; the wireless communication protocol communication system can be in wireless connection, communication protocol connection, mechanical connection and electric connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention is described in further detail below with reference to the attached drawing figures:
first embodiment, a flotation device suitable for collecting froth products
As shown in fig. 1, an axial cross-section of the flotation apparatus, the flotation apparatus comprising: the device comprises a cylinder body, a partition plate 1, a separation plate 2 and an inflation device; one end of the cylinder body is opened, the other end of the cylinder body is closed, and the cylinder body is divided into two chambers by the partition plate; the two chambers are communicated at one closed end of the cylinder body, and the two chambers are not communicated at one open end of the cylinder body; the cylinder body is placed in an inclined standing mode, the inclined standing mode can be realized through the support, Y is in a horizontal direction, Z is in a vertical direction, one end of the cylinder body, which is communicated with the two chambers, faces upwards, and the other end of the cylinder body, which is not communicated with the two chambers, faces downwards; the two chambers are divided into a first chamber 3 and a second chamber 5 from top to bottom according to the distance from the ground, and a mineral discharge port and a mineral feed port 8 are respectively formed at one downward end of the first chamber 3 and one downward end of the second chamber 5; the discharge opening is in turn divided by the sorting deck 2 into a first product outlet 6 and a second product outlet 7. An inflation inlet 9 is formed in the chamber wall of one side, close to the ground, of the second chamber 5, and the inflation equipment inflates the second chamber 5 through the inflation inlet 9.
The included angle between the oblique vertical direction of the cylinder body and the horizontal direction is 0-90 degrees, because ore pulp can move upwards against the gravity field in the stage before separation, gangue minerals without bubbles are promoted to move to the bottom along the gravity field, and mineralized bubbles are enriched at the upper part; when the device reaches the highest point, the foam layer is completely separated out from the ore pulp, so that the foam layer floats on the upper part of the selected underflow and flows downwards together with the selected underflow in the subsequent gravity field; at the moment, the foam products and the selected underflow are obviously layered, and the positions of the separation plates 2 are controlled to separate the foam products and the selected underflow at the outlet, so that 2 products are obtained;
the front and the rear of the ore feeding mouth 8 are respectively provided with a horn mouth shape, the narrow mouth parts of the two horn mouths are communicated, the diffusion angle of the front horn mouth of the ore feeding mouth is smaller than that of the rear horn mouth of the ore feeding mouth, and the ratio of the diffusion angle of the front horn mouth of the ore feeding mouth to that of the rear horn mouth of the ore feeding mouth is 2:7; this will help to achieve a better spray atomization effect, enhancing dispersion, like a venturi effect; the lower layer of the cylinder is divided into 3 areas along the flow direction of ore pulp, namely a dispersing area 10, a mineralizing area 11 and a sorting area 12; the air charging port 9 is spread on the chamber wall of one side of the second chamber 5 close to the ground in a surface arrangement manner in a form of occupying the peaks of a diamond or square; the pore diameter of the charging port 9 is the largest in a dispersion area 10, and the mineralization area 11 and the separation area 12 times; the air charging openings 9 are distributed in the mineralization area 10 most densely, and the degree of the densely is slightly reduced along the movement direction of ore pulp; the aeration pressure and the gas flow rate are different according to the different positions of the areas, the maximum pressure of the dispersing area 10, the maximum mineralization area 11 times and the secondary separation area 12 times, the maximum gas flow rate of the mineralization area 11, the maximum mineralization area 10 times and the secondary separation area 12 times, the aeration pressure ranges from 150 kPa to 250kPa, and the aeration flow rate ranges from 0.5 m to 1.5m 3 /m 2 /min。
As can be seen from the a-direction view of the flotation plant, the chamber widths of the first chamber 3 and the second chamber 5 decrease in sequence in radial cross section, the chamber width of the first chamber 3 being 2.5 times the chamber width of the second chamber 5 and the chamber width of the first chamber 3 being 1.5 times the radial height of the bowl, as shown in fig. 2. The structure of the 'upper wide and lower narrow' is beneficial to the dispersion of bubbles and the formation of mineralized bubbles, thereby creating conditions for the precipitation of a subsequent foam layer; a separation plate 2 for separating foam products and selected underflow is arranged at the ore discharge opening of the first chamber 3, the separation plate 2 can adjust the distance between the separation plate 2 and the partition plate 1, the separation plate 2 is close to the partition plate 1, the recovery rate of the foam products is improved, and the separation plate 2 is far away from the partition plate 1, the grade of the foam products is improved.
Embodiment two, a flotation method suitable for flotation equipment for collecting foam products
In combination with fig. 1 and 2, the flotation process comprises the steps of:
step one, pre-mixing ore feeding with the mass fraction of solids being 20% -30% with a flotation reagent, and pressurizing the mixture to feed the mixture from an ore feeding port 8 after the mixture is uniformly mixed, wherein the flow is 10-20L/min;
step two, ore pulp enters a dispersing area 10, continuous jet flow is carried out through an inflation inlet 9 with a thicker hole at the bottom, the jet pressure is alternately circulated in a strong and weak mode, so that turbulence with the largest quantity is generated, and secondary full dispersion of the ore pulp is realized;
step three, after ore pulp enters a mineralization area 11, intermittent pulse jet flow is carried out through an air charging port 9 at the bottom, distribution points and jet pressure of the jet flow are slightly reduced and reduced along with movement of the ore pulp, intermittent mineralization and continuous layering are realized, the aim of reducing gangue entrainment is achieved, layering speed is in gradient arrangement, time is won for enrichment of mineralized bubbles, a channel is formed for shedding of gangue, and objective easily-floated minerals are promoted to move upwards along with the bubbles, and gangue minerals are separated from the bubbles to sink; the shape of the second chamber 5 with wide upper part and narrow lower part in the radial section also promotes the generation of an upper negative pressure zone, and accelerates the process;
and step four, after the ore pulp enters the separation zone 12, the mineralization process is almost finished, under the assistance of uniform and stable air flow at the bottom air charging port 9, after the ore pulp moves upwards along the inclined cube direction to the top end of the equipment, foam products are discharged from the first product outlet 6 after passing through the separation plate 2 due to small density, and the selected underflow products are discharged from the second product outlet 7 after passing through the separation plate 2 due to large density, so that 2 products, namely foam products and selected underflow, are generated. These two products are discharged in laminar flow through the sorting deck 2 from the first and second discharge openings 6, 7, respectively, and can be used as final products or for further sorting operations.
Third embodiment, flotation of graphite pulp
With reference to fig. 1 and 2, a graphite slurry (solid mass fraction 30%) having a particle size of-0.15 mm and a content of 70% was used as the feed for the flotation apparatus of the present invention, and the operation method was as follows:
step one, pre-mixing the graphite ore pulp, 100g/t of collector and 50g/t of foaming agent (g/t is relative to the weight of solid in ore feeding) in a stirring barrel for 20min, and pressurizing and feeding the mixture from an ore feeding port 8 after uniformly mixing, wherein the flow is 15L/min;
step two, ore pulp enters a dispersing area 10, continuous jet flow is carried out through an inflation inlet 9 with a thicker hole at the bottom, the jet pressure is alternately circulated in a strong and weak mode, so that turbulence with the largest quantity is generated, and secondary full dispersion of the ore pulp is realized;
and thirdly, after the ore pulp enters the mineralization area 11, intermittent pulse jet flow is performed through the air charging port 9 at the bottom, and the distribution point and the jet pressure of the jet flow are slightly reduced and reduced along with the movement of the ore pulp, so that intermittent mineralization and continuous layering are realized, graphite minerals are promoted to move upwards along with bubbles, and gangue minerals (silicate and the like) are separated from the bubbles to sink. The shape of the second chamber 5 with wide upper part and narrow lower part in the radial section also promotes the generation of an upper negative pressure zone, and accelerates the process;
step four, after the ore pulp enters the sorting area 12, the mineralization process is almost finished, under the assistance of uniform and stable air flow at the bottom air charging port 9, after the ore pulp moves upwards along the inclined cube to the top end of the equipment, foam products are discharged from the first product outlet 6 after passing through the sorting plate 2 due to small density, and after the underflow products are discharged from the second product outlet 7 after passing through the sorting plate 2 due to large density, so that 2 products, namely graphite foam products and after-sorting underflow, are generated, and the two products are respectively discharged from the two ore discharge ports through the sorting plate 2 in a laminar flow state and can be used as final products or enter the next sorting operation.
Conclusion:
the beneficial effects of the specific embodiment are as follows:
(1) Traditional graphite, mica and high-mud-content easy-to-float mineral flotation equipment often adopts a flotation machine or a flotation column, and the flotation machine needs mechanical strong stirring, so that component abrasion and energy consumption waste are caused; flotation columns are often used because of the need for sufficient separation distance in the axial direction, resulting in high columns, increased plant capital construction, etc. The invention uses different airflows and different sites to disperse and sort, changes the traditional concept of indirectly promoting the action of gas and mineral through mechanical energy or expanding and prolonging the action of gas and mineral in space time to increase the opportunity of the action of gas and mineral, and changes the concept into the direct control of airflows to directly act with mineral particles. The prior indirect control is changed into direct control, so that the control capability is enhanced, the control effect is improved, the indirect energy consumption is reduced, and the action efficiency is improved;
(2) In the traditional flotation process of graphite, mica and easily-floated minerals with high mud content, after mineralized bubbles are generated, the collecting bubbles such as scraping plates or liquid level improvement are needed to provide additional energy, and the flotation equipment and the operation method provided by the invention utilize the natural reduction of gravitational potential energy to smoothly discharge the bubbles, so that the flotation equipment and the operation method are economical and environment-friendly;
(3) In the traditional flotation process of graphite, mica and easily-floated minerals with high mud content, foam is required to be scraped out slowly for a plurality of times, but due to the large foam quantity, high concentration and poor fluidity, the phenomenon of in-situ idle running of a scraper is often caused, the ore discharge rate is very low, and even the phenomenon of leakage and drooling occurs; the flotation equipment and the operation method provided by the invention discharge the generated foam as a whole at one time, so that the ore discharge rate is greatly improved;
(4) The flotation equipment and the operation method provided by the invention realize the functions of dispersing ore pulp and generating mineralized foam directly through the regulation and control of aeration, and compared with the mechanical transmission operation in the traditional process, the flotation equipment and the operation method can reduce noise pollution and improve the workshop working environment while saving various costs.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A flotation plant adapted to collect froth products, the flotation plant comprising: barrel, baffle, sorting board and air charging equipment; one end of the cylinder body is opened, the other end of the cylinder body is closed, and the cylinder body is divided into two chambers by a partition plate; the two chambers are communicated at one closed end of the cylinder body, and the two chambers are not communicated at one open end of the cylinder body;
the cylinder body is placed in an inclined mode, the closed end of the cylinder body faces upwards, and the open end of the cylinder body faces downwards;
the two chambers are divided into a first chamber and a second chamber from top to bottom according to the distance from the ground, and a mineral discharge port and a mineral feed port are respectively formed at one downward end of the first chamber and the second chamber;
the separation plate is arranged at the ore discharge port and divides the ore discharge port into a first product outlet and a second product outlet;
the wall of the chamber on one side of the second chamber close to the ground is provided with a plurality of inflation ports, and the inflation equipment inflates the second chamber through the inflation ports.
2. The flotation plant according to claim 1, wherein the angle of the cylinder in the oblique direction is 0 ° to 90 ° to the horizontal direction.
3. The flotation plant according to claim 1, wherein the radial cross section of the cylinder is trapezoid-like, the cylinder being cylindrical-like in the axial direction.
4. The flotation plant according to claim 1, wherein in radial cross section the chamber widths of the first and second chambers decrease in sequence, the first chamber width being 2-3 times the second chamber width, the first chamber width being 1-2 times the radial height of the bowl.
5. The flotation equipment according to claim 1, wherein the front and the rear of the ore feeding mouth are respectively provided with a horn mouth shape, the narrow mouth parts of the two horn mouths are communicated, and the diffusion angle of the horn mouth before the ore feeding mouth is smaller than that of the horn mouth after the ore feeding mouth.
6. The flotation plant according to claim 1, wherein the second chamber is divided into a dispersion zone, a mineralization zone and a separation zone in sequence from low to high distance from the ground;
the apertures of the charging openings of the dispersing area, the mineralizing area and the sorting area are sequentially reduced;
the inflation pressures of the inflation openings of the dispersing area, the mineralizing area and the sorting area are sequentially reduced;
the gas flow rate of the charging port of the mineralization area is larger than that of the charging ports of the dispersing area and the sorting area;
the distribution of the charging openings of the mineralization area is denser than that of the charging openings of the dispersing area and the sorting area, and the distribution density of the charging openings of the mineralization area is gradually reduced along the movement direction of ore pulp;
the inflation pressure of the inflation inlet is 150-250 kPa;
the inflation flow of the inflation inlet ranges from 0.5 m to 1.5m 3 /m 2 /min。
7. A flotation process according to any one of the claims 1-6, wherein the process comprises the steps of:
step one, pre-mixing ore pulp and a flotation reagent, and pressurizing and feeding the ore pulp and the flotation reagent from an ore feeding port after uniformly mixing;
step two, after the ore pulp enters a dispersing area, continuously spraying the ore pulp through a bottom gas charging port, wherein the spraying pressures are alternately circulated in a strong and weak mode;
step three, after the ore pulp enters a mineralization area, intermittent pulse jet flow is performed through a bottom gas charging port;
and fourthly, after the ore pulp enters the separation zone, uniformly and stably spraying flow through a bottom air charging port, so that the ore pulp moves upwards along an inclined cube to reach the top end of the flotation equipment and is separated into foam products and selected underflow products, wherein the foam products are discharged from a first product outlet after passing through the separation plate due to low density, and the selected underflow products are discharged from a second product outlet after passing through the separation plate due to high density.
8. The flotation process according to claim 7, wherein the mass fraction of solids in the slurry in the first step is 20 to 30% and the flow rate of the slurry fed from the inlet is 10 to 20L/min.
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| CN113198622A (en) * | 2021-05-18 | 2021-08-03 | 中南大学 | Micro-bubble secondary mineralization flotation equipment and flotation method |
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| CN113198622A (en) * | 2021-05-18 | 2021-08-03 | 中南大学 | Micro-bubble secondary mineralization flotation equipment and flotation method |
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